1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests sequential and parallel MatGetRow() and MatRestoreRow().\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat C; 9c4762a1bSJed Brown PetscInt i,j,m = 5,n = 5,Ii,J,nz,rstart,rend; 10c4762a1bSJed Brown PetscErrorCode ierr; 11c4762a1bSJed Brown PetscMPIInt rank; 12c4762a1bSJed Brown const PetscInt *idx; 13c4762a1bSJed Brown PetscScalar v; 14c4762a1bSJed Brown const PetscScalar *values; 15c4762a1bSJed Brown 16c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 17c4762a1bSJed Brown /* Create the matrix for the five point stencil, YET AGAIN */ 18c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&C);CHKERRQ(ierr); 19c4762a1bSJed Brown ierr = MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n);CHKERRQ(ierr); 20c4762a1bSJed Brown ierr = MatSetFromOptions(C);CHKERRQ(ierr); 21c4762a1bSJed Brown ierr = MatSetUp(C);CHKERRQ(ierr); 22c4762a1bSJed Brown for (i=0; i<m; i++) { 23c4762a1bSJed Brown for (j=0; j<n; j++) { 24c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 25c4762a1bSJed Brown if (i>0) {J = Ii - n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 26c4762a1bSJed Brown if (i<m-1) {J = Ii + n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 27c4762a1bSJed Brown if (j>0) {J = Ii - 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 28c4762a1bSJed Brown if (j<n-1) {J = Ii + 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 29c4762a1bSJed Brown v = 4.0; ierr = MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES);CHKERRQ(ierr); 30c4762a1bSJed Brown } 31c4762a1bSJed Brown } 32c4762a1bSJed Brown ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 33c4762a1bSJed Brown ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 34c4762a1bSJed Brown ierr = MatView(C,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 35c4762a1bSJed Brown 36ffc4695bSBarry Smith ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRMPI(ierr); 37c4762a1bSJed Brown ierr = MatGetOwnershipRange(C,&rstart,&rend);CHKERRQ(ierr); 38c4762a1bSJed Brown for (i=rstart; i<rend; i++) { 39c4762a1bSJed Brown ierr = MatGetRow(C,i,&nz,&idx,&values);CHKERRQ(ierr); 40*dd400576SPatrick Sanan if (rank == 0) { 41c4762a1bSJed Brown for (j=0; j<nz; j++) { 42c4762a1bSJed Brown ierr = PetscPrintf(PETSC_COMM_SELF,"%D %g ",idx[j],(double)PetscRealPart(values[j]));CHKERRQ(ierr); 43c4762a1bSJed Brown } 44c4762a1bSJed Brown ierr = PetscPrintf(PETSC_COMM_SELF,"\n");CHKERRQ(ierr); 45c4762a1bSJed Brown } 46c4762a1bSJed Brown ierr = MatRestoreRow(C,i,&nz,&idx,&values);CHKERRQ(ierr); 47c4762a1bSJed Brown } 48c4762a1bSJed Brown 49c4762a1bSJed Brown ierr = MatDestroy(&C);CHKERRQ(ierr); 50c4762a1bSJed Brown ierr = PetscFinalize(); 51c4762a1bSJed Brown return ierr; 52c4762a1bSJed Brown } 53c4762a1bSJed Brown 54c4762a1bSJed Brown /*TEST 55c4762a1bSJed Brown 56c4762a1bSJed Brown test: 57c4762a1bSJed Brown 58c4762a1bSJed Brown TEST*/ 59